for me it depends on the situation and person. Years ago I did disclose because there was a possibility of one of my abusers breaking in and coming after me in which case that made my significant others a target too, so I felt it wasn't fair to not tell them and suddenly one night having to deal with a break in/attack. Now there is no reason for advance notice because that abuser is dead so now I base how much I tell on the person. I don't hide it either. I still answer flat out - question "whats your family like?" - answer "like any other family sometimes we get along some times we don't . right now with most of them we don't so we are staying clear of each other. Like with any other family there is an occasional member or two that I consider border on abuse and stay away from those. I have contact with so and so and so ...." If the question of was I abused comes up (usually after a nightmare) I say yea as a matter of fact I was physically, emotionally and sexually abused some from family members that are no longer in my life and some from others - strangers, acquaintences. Right now I'm not ready to discuss the details but I do have nightmares and mood swings because of it so if I suddenly strike out in my sleep or suddenly act different don't take it personally just give me some time and maybe ask what I need or give me space and I'll be fine. That is usually enough information for the person to understand me and they leave it at that.